Positioning clamp

Abstract

The utility model relates to the technical field of clamps, and discloses a positioning clamp which comprises a workpiece and a platform, a power mechanism is arranged at the top of the platform, and the power mechanism comprises a motor, a fixing block, a guide rod, a bidirectional threaded rod, a fixing plate, a driving shaft, a belt, a connecting sleeve, an inner gear ring, a first spring, a triangular prism block and a first telescopic rod. A clamping mechanism is arranged on the surface of the guide rod and comprises a guide plate, and the surface of the guide rod penetrates through the inner wall of the guide plate. According to the positioning clamp, the clamping mechanism is arranged, and rollers abut against the surface of a workpiece, so that air communicating between a hollow cuboid block and a connecting ventilation pipeline is extruded, the rollers abut against a sliding sealing block to abut against the workpiece in a surrounding mode according to the arc angle, and the workpiece is tightly abutted and clamped; therefore, broach clamps with different diameters do not need to be replaced, and the effect of convenient operation is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of clamps, in particular to a positioning clamp. Background Art

[0002] The positioning fixture for broach manufacturing is a device used to fix and position the tool to ensure the accurate position of the tool during the processing.

[0003] However, different diameter broaches require different sizes of fixtures to clamp them to ensure the matching between the broach and the workpiece and the accurate control of the gap. This fixture needs to be replaced with different fixtures, which causes certain inconveniences, but this is an inevitable result of the difference in broach diameters. Different diameter broaches require different fixtures to maintain stability and accuracy during processing, which causes inconvenience to processing. Utility Model Content

[0004] The purpose of the utility model is to provide a positioning fixture to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a positioning fixture, including a workpiece and a platform, the workpiece is a raw material for a broach, a power mechanism is arranged on the top of the platform, and the power mechanism includes: a motor, a fixed block, a guide rod, a bidirectional threaded rod, a fixed plate, a drive shaft, a belt, a connecting sleeve, an inner gear ring, a spring, a triangular prism block, and a telescopic rod. A clamping mechanism is arranged on the surface of the guide rod, and the clamping mechanism includes:

[0006] The guide plate, the surface of the guide rod passes through the inner wall of the guide plate, and the surface of the guide rod is slidably connected to the inner wall of the guide plate, the surface of the guide plate is fixedly connected to one end of the spring 2, the other end of the spring 2 is fixedly connected to the surface of the rotating ring, the surface of the rotating ring close to the guide plate is fixedly connected to one end of the telescopic rod 2, the other end of the telescopic rod 2 is fixedly connected to the surface of the guide plate, the surface of the rotating ring away from the spring 2 is rotatably connected to the connecting plate, the surface of the connecting plate away from the spring 2 is fixedly connected to the hollow rectangular block, the piston on the inner wall of the hollow rectangular block is connected to a sliding sealing block, the surface of the sliding sealing block is fixedly connected to a connecting frame, the connecting frame is rotatably connected to the surface of the roller, the hollow rectangular block The two are fixedly connected by connecting the ventilation pipe, one end of the spring three is fixedly connected to the inner wall of the hollow rectangular block, the other end of the spring three is fixedly connected to the lightweight plate, the bottom of the lightweight plate is fixedly connected to a lightweight piston rod, the top of the lightweight piston rod away from the lightweight plate is fixedly connected to a limiting block, the side of the guide plate away from the spring two is fixedly connected to a fixing ring, and a limiting gear ring is provided on the inner wall of the fixing ring. The roller contacts the surface of the workpiece, so that the air connected to the hollow rectangular block and the connecting ventilation pipe is squeezed, so that several rollers contact the sliding sealing block to surround the workpiece at an arc angle, so that the workpiece is tightly clamped by the contact, so that there is no need to replace the broaching clamps of different diameters, which facilitates the operation.

[0007] The connecting plate is moved toward the direction of the guide plate by the reverse force, and the guide plate squeezes spring two. The guide plate drives the lightweight plate and the lightweight piston rod to move toward the direction of the fixed ring through spring three. The lightweight piston rod drives the limit block to engage with the limit gear ring, which restricts the rotation of the lightweight piston rod and the limit block, limits the rotation of the connecting plate, and facilitates the adjustment of the clamping angle.

[0008] Preferably, the top of the platform is fixedly connected to the housing of the motor, the top of the platform is fixedly connected to a fixing block, the surface of the fixing block is fixedly connected to a guide rod, the surface of the fixing block is fixedly connected to a bidirectional threaded rod, the top of the platform is fixedly connected to a fixing plate, the left side of the fixing plate is rotatably connected to a driving shaft, the surface of the driving shaft and the surface of the bidirectional threaded rod are connected through a belt drive, the output shaft of the motor is fixedly connected to a connecting sleeve, the inner wall of the connecting sleeve is provided with an internal gear ring, and the surface of the driving shaft is fixedly connected to a spring. The first end of the spring is fixedly connected to a triangular prism block, and the side of the triangular prism block close to the driving shaft is fixedly connected to one end of a telescopic rod one, and the other end of the telescopic rod one is fixedly connected to the surface of the driving shaft. When the workpiece is clamped, under the reaction force of the roller, the force of the triangular prism block and the inner gear ring against each other increases. At this time, the spring one is squeezed, and the triangular prism block moves toward the direction of the driving shaft, so that the triangular prism block moves repeatedly on the inner wall of the inner gear ring, so that the force of the motor output shaft no longer increases the clamping force, thereby avoiding the output shaft of the motor from being stuck and causing damage.

[0009] Preferably, the surface of the bidirectional threaded rod penetrates the inner wall of the guide plate, and the surface of the bidirectional threaded rod is threadedly connected to the inner wall of the guide plate, and the bidirectional threaded rod drives the guide plate to move left and right, playing a transmission role.

[0010] Preferably, the number of the hollow rectangular blocks is five, and the five hollow rectangular blocks are arranged in an array so that the cylindrical workpiece is evenly clamped.

[0011] Preferably, the surface of the lightweight piston rod passes through the inner wall of the hollow rectangular block, and the surface of the lightweight piston rod is connected to the inner wall piston of the hollow rectangular block, which plays a sealing role.

[0012] Preferably, the surface of the lightweight piston rod penetrates the inner wall of the connecting plate, and the surface of the lightweight piston rod penetrates the inner wall of the guide plate, and the lightweight piston rod plays a transmission role.

[0013] Compared with the prior art, the utility model provides a positioning fixture, which has the following beneficial effects:

[0014] 1. The positioning fixture is provided with a clamping mechanism, and the roller contacts the surface of the workpiece, so that the air interconnected between the hollow rectangular block and the connecting ventilation duct is squeezed, so that several rollers contact the sliding sealing block to surround the workpiece at an arc angle, so that the workpiece is tightly clamped, so that there is no need to replace the broaching fixture of different diameters, which plays a role in convenient operation.

[0015] 2. The positioning fixture is provided with a clamping mechanism. The connecting plate is moved toward the direction of the guide plate by the reverse force. The guide plate squeezes spring 2. The guide plate drives the lightweight plate and the lightweight piston rod to move toward the direction of the fixed ring through spring 3. The lightweight piston rod drives the limit block to engage with the limit gear ring, which limits the rotation of the lightweight piston rod and the limit block, limits the rotation of the connecting plate, and facilitates the adjustment of the clamping angle.

[0016] 2. The positioning fixture is provided with a power mechanism. When the workpiece is clamped, under the reaction force of the roller, the force between the triangular prism block and the inner gear ring increases. At this time, once the spring is squeezed, the triangular prism block moves toward the direction of the drive shaft, so that the triangular prism block moves repeatedly on the inner wall of the inner gear ring, so that the force of the motor output shaft no longer increases the clamping force, thereby avoiding the motor output shaft being stuck and causing damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the front view of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the power mechanism of the utility model;

[0019] Figure 3 It is a schematic diagram of the cross-sectional structure of the connecting sleeve of the utility model;

[0020] Figure 4 It is a structural schematic diagram of the clamping mechanism of the utility model;

[0021] Figure 5 It is a cross-sectional structural diagram of a top view of a hollow rectangular block and a connecting plate of the utility model;

[0022] Figure 6 It is a cross-sectional structural diagram of the front view of the hollow rectangular block and the connecting plate of the utility model;

[0023] Figure 7 It is a structural schematic diagram of the limiting gear ring of the utility model.

[0024] In the figure: 1. workpiece; 2. platform; 3. power mechanism; 31. motor; 32. fixed block; 33. guide rod; 34. bidirectional threaded rod; 35. fixed plate; 36. drive shaft; 37. belt; 38. connecting sleeve; 39. inner gear ring; 310. spring one; 311. triangular prism block; 312. telescopic rod one; 4. clamping mechanism; 41. guide plate; 42. spring two; 43. rotating ring; 44. telescopic rod two; 45. connecting plate; 46. hollow rectangular block; 47. sliding sealing block; 48. connecting frame; 49. roller; 410. connecting ventilation duct; 411. spring three; 412. lightweight plate; 413. lightweight piston rod; 414. limit block; 415. fixed ring; 416. limit gear ring. DETAILED DESCRIPTION

[0025] like Figure 1-Figure 7 As shown, the utility model provides a technical solution: a positioning fixture, including a workpiece 1 and a platform 2, a power mechanism 3 is arranged on the top of the platform 2, the workpiece 1 is a raw material for a broach, the power mechanism 3 includes: a motor 31, a fixed block 32, a guide rod 33, a bidirectional threaded rod 34, a fixed plate 35, a drive shaft 36, a belt 37, a connecting sleeve 38, an inner gear ring 39, a spring 1 310, a triangular prism block 311, a telescopic rod 1 312, and a clamping mechanism 4 is arranged on the surface of the guide rod 33, and the clamping mechanism 4 includes: a guide plate 41, a spring 2 42, a rotating ring 43, a telescopic rod 2 44, a connecting plate 45, a hollow rectangular block 46, a sliding sealing block 47, a connecting frame 48, a roller 49, a connecting ventilation duct 410, a spring 3 411, a lightweight plate 412, a lightweight piston rod 413, a limit block 414, a fixed ring 415, and a limit gear ring 416.

[0026] The surface of the guide rod 33 passes through the inner wall of the guide plate 41, and the surface of the guide rod 33 is slidably connected to the inner wall of the guide plate 41, one end of the spring 2 42 is fixedly connected to the surface of the guide plate 41, the other end of the spring 2 42 is fixedly connected to the surface of the rotating ring 43, the surface of the rotating ring 43 close to the guide plate 41 is fixedly connected to one end of the telescopic rod 2 44, the other end of the telescopic rod 2 44 is fixedly connected to the surface of the guide plate 41, the surface of the rotating ring 43 away from the spring 2 42 is rotatably connected to the connecting plate 45, the surface of the connecting plate 45 away from the spring 2 42 is fixedly connected to the hollow rectangular block 46, and a piston is provided on the inner wall of the hollow rectangular block 46. A sliding sealing block 47 is connected, a connecting frame 48 is fixedly connected to the surface of the sliding sealing block 47, and the connecting frame 48 is rotatably connected to the surface of the roller 49. The hollow rectangular blocks 46 are fixedly connected by connecting the ventilation pipe 410. One end of the spring three 411 is fixedly connected to the inner wall of the hollow rectangular block 46, and the other end of the spring three 411 is fixedly connected to a lightweight plate 412. A lightweight piston rod 413 is fixedly connected to the bottom of the lightweight plate 412. The top of the lightweight piston rod 413 away from the lightweight plate 412 is fixedly connected to a limiting block 414. A fixed ring 415 is fixedly connected to the side of the guide plate 41 away from the spring two 42. The fixed ring 415 A limited gear ring 416 is provided on the inner wall of the motor 31, the motor 31 is turned on, the output shaft of the motor 31 drives the connecting sleeve 38 to rotate, the inner gear ring 39 of the connecting sleeve 38 contacts and drives the triangular prism block 311 to rotate, the spring 1 310 makes the triangular prism block 311 and the inner gear ring 39 contact tightly, the triangular prism block 311 drives the driving shaft 36 through the telescopic rod 1 312, the driving shaft 36 drives the bidirectional threaded rod 34 to rotate through the belt 37, the bidirectional threaded rod 34 drives the guide plate 41 to slide left and right on the surface of the guide rod 33, so that the guide plates 41 on both sides are close to each other, so that the guide plate 41 drives the spring 2 42 to move in the direction of the workpiece 1, and the spring 2 42 drives the rotating ring 43 moves in the direction of the workpiece 1, the rotating ring 43 drives the connecting plate 45 to move in the direction of the workpiece 1, the connecting plate 45 drives the hollow rectangular block 46, the sliding sealing block 47, the connecting frame 48, and the roller 49 to move in the direction of the workpiece 1, the roller 49 contacts the surface of the workpiece 1, so that the air interconnected between the hollow rectangular block 46 and the connecting ventilation duct 410 is squeezed, so that several rollers 49 contact the sliding sealing block 47 to surround the workpiece 1 at an arc angle, so that the workpiece 1 is tightly clamped, so that no matter how long the diameter of the workpiece 1 is, it can be tightly clamped without replacing the broaching fixture of different diameters, which plays a role in facilitating operation.

[0027] Before clamping, the connecting plate 45 can be rotated. When clamping, the connecting plate 45 is moved in the direction of the guide plate 41 by the reverse force. The guide plate 41 squeezes the spring 2 42. The guide plate 41 drives the lightweight plate 412 and the lightweight piston rod 413 to move in the direction of the fixed ring 415 through the spring 3 411. The lightweight piston rod 413 drives the limit block 414 to engage with the limit gear ring 416, which plays a role in limiting the rotation of the lightweight piston rod 413 and the limit block 414, and plays a role in limiting the rotation of the connecting plate 45, which plays a role in facilitating the adjustment of the clamping angle. The surface of the bidirectional threaded rod 34 passes through the inner wall of the guide plate 41, and the bidirectional threaded rod The surface of 34 is threadedly connected to the inner wall of the guide plate 41, and the bidirectional threaded rod 34 drives the guide plate 41 to move left and right, playing a transmission role. The number of hollow rectangular blocks 46 is five, and the five hollow rectangular blocks 46 are arranged in an array so that the cylindrical workpiece 1 is evenly clamped. The surface of the lightweight piston rod 413 penetrates the inner wall of the hollow rectangular block 46, and the surface of the lightweight piston rod 413 is connected to the inner wall piston of the hollow rectangular block 46, which plays a sealing role. The surface of the lightweight piston rod 413 penetrates the inner wall of the connecting plate 45, and the surface of the lightweight piston rod 413 penetrates the inner wall of the guide plate 41, and the lightweight piston rod 413 plays a transmission role.

[0028] The top of the platform 2 is fixedly connected to the housing of the motor 31, the top of the platform 2 is fixedly connected to a fixing block 32, the surface of the fixing block 32 is fixedly connected to a guide rod 33, the surface of the fixing block 32 is fixedly connected to a bidirectional threaded rod 34, the top of the platform 2 is fixedly connected to a fixing plate 35, the left side of the fixing plate 35 is rotatably connected to a driving shaft 36, the surface of the driving shaft 36 and the surface of the bidirectional threaded rod 34 are connected by a belt 37, the output shaft of the motor 31 is fixedly connected to a connecting sleeve 38, the inner wall of the connecting sleeve 38 is provided with an inner gear ring 39, one end of a spring 310 is fixedly connected to the surface of the driving shaft 36, and the other end of the spring 310 is fixedly connected to the surface of the driving shaft 36. The end is fixedly connected to a triangular prism block 311, and one end of a telescopic rod 312 is fixedly connected to the side of the triangular prism block 311 close to the driving shaft 36, and the other end of the telescopic rod 312 is fixedly connected to the surface of the driving shaft 36. When the workpiece 1 is clamped, under the reaction force of the roller 49, the force of the triangular prism block 311 and the inner gear ring 39 contacting each other increases. At this time, the spring 310 is squeezed, and the triangular prism block 311 moves toward the driving shaft 36, so that the triangular prism block 311 moves repeatedly on the inner wall of the inner gear ring 39, so that the force of the output shaft of the motor 31 no longer increases the clamping force, thereby avoiding the output shaft of the motor 31 from being stuck and causing damage.

[0029] Based on the above embodiment, the motor 31 is turned on, and the output shaft of the motor 31 drives the connecting sleeve 38 to rotate, and the inner gear ring 39 of the connecting sleeve 38 contacts and drives the triangular prism block 311 to rotate, and the spring 1 310 makes the triangular prism block 311 tightly contact with the inner gear ring 39, and the triangular prism block 311 drives the driving shaft 36 through the telescopic rod 1 312, and the driving shaft 36 drives the bidirectional threaded rod 34 to rotate through the belt 37, and the bidirectional threaded rod 34 drives the guide plate 41 to slide left and right on the surface of the guide rod 33, so that the guide plates 41 on both sides are close to each other, so that the guide plate 41 drives the spring 2 42 to move in the direction of the workpiece 1, and the spring 2 42 drives the rotating ring 43 to The workpiece 1 moves in the direction of the rotating ring 43, and the connecting plate 45 drives the hollow rectangular block 46, the sliding sealing block 47, the connecting frame 48, and the roller 49 to move in the direction of the workpiece 1. The roller 49 contacts the surface of the workpiece 1, so that the air interconnected between the hollow rectangular block 46 and the connecting ventilation duct 410 is squeezed, so that several rollers 49 contact the sliding sealing block 47 to surround the workpiece 1 at an arc angle, so that the workpiece 1 is tightly clamped, so that no matter how long the diameter of the workpiece 1 is, it can be tightly clamped without replacing the broaching fixture of different diameters, which facilitates the operation.

[0030] The connecting plate 45 can be rotated before clamping. When clamping, the connecting plate 45 is moved toward the direction of the guide plate 41 by the reverse force. The guide plate 41 squeezes the spring two 42. The guide plate 41 drives the lightweight plate 412 and the lightweight piston rod 413 to move toward the direction of the fixed ring 415 through the spring three 411. The lightweight piston rod 413 drives the limit block 414 to engage with the limit gear ring 416, which limits the rotation of the lightweight piston rod 413 and the limit block 414, limits the rotation of the connecting plate 45, and facilitates the adjustment of the clamping angle.

[0031] After the workpiece 1 is clamped, under the reaction force of the roller 49, the force of the triangular prism block 311 and the inner gear ring 39 against each other increases. At this time, the spring 1 310 is squeezed, and the triangular prism block 311 moves toward the direction of the drive shaft 36, so that the triangular prism block 311 moves repeatedly on the inner wall of the inner gear ring 39, so that the force of the output shaft of the motor 31 no longer increases the clamping force, thereby avoiding the output shaft of the motor 31 from being stuck and causing damage.

[0032] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not deviate from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A positioning fixture, comprising a workpiece (1) and a platform (2), characterized in that: A power mechanism (3) is arranged on the top of the platform (2), and the power mechanism (3) comprises: a motor (31), a fixing block (32), a guide rod (33), a bidirectional threaded rod (34), a fixing plate (35), a driving shaft (36), a belt (37), a connecting sleeve (38), an inner gear ring (39), a spring (310), a triangular prism block (311), and a telescopic rod (312). A clamping mechanism (4) is arranged on the surface of the guide rod (33), and the clamping mechanism (4) comprises: The guide plate (41) has a surface of the guide rod (33) that penetrates the inner wall of the guide plate (41), and the surface of the guide rod (33) is slidably connected to the inner wall of the guide plate (41); the surface of the guide plate (41) is fixedly connected to one end of the second spring (42); the other end of the second spring (42) is fixedly connected to the surface of the rotating ring (43); the surface of the rotating ring (43) close to the guide plate (41) is fixedly connected to one end of the second telescopic rod (44); the other end of the second telescopic rod (44) is fixedly connected to the surface of the guide plate (41); the surface of the rotating ring (43) away from the second spring (42) is rotatably connected to a connecting plate (45); the surface of the connecting plate (45) away from the second spring (42) is fixedly connected to a hollow rectangular block (46); a piston is connected to a sliding seal on the inner wall of the hollow rectangular block (46). The sealing block (47) includes a connecting frame (48) fixedly connected to the surface of the sliding sealing block (47), the connecting frame (48) being rotatably connected to the surface of the roller (49), the hollow rectangular blocks (46) being fixedly connected via a connecting ventilation pipe (410), one end of a spring three (411) being fixedly connected to the inner wall of the hollow rectangular block (46), the other end of the spring three (411) being fixedly connected to a lightweight plate (412), a lightweight piston rod (413) being fixedly connected to the bottom of the lightweight plate (412), a top of the lightweight piston rod (413) being fixedly connected to a limiting block (414) away from the lightweight plate (412), a fixing ring (415) being fixedly connected to the side of the guide plate (41) being away from the spring two (42), and a limiting gear ring (416) being provided on the inner wall of the fixing ring (415).

2. A positioning fixture according to claim 1, characterized in that: The top of the platform (2) is fixedly connected to the housing of the motor (31), the top of the platform (2) is fixedly connected to a fixing block (32), the surface of the fixing block (32) is fixedly connected to a guide rod (33), the surface of the fixing block (32) is fixedly connected to a bidirectional threaded rod (34), the top of the platform (2) is fixedly connected to a fixing plate (35), the left side of the fixing plate (35) is rotatably connected to a driving shaft (36), and the surface of the driving shaft (36) and the surface of the bidirectional threaded rod (34) are driven by a belt (37). The output shaft of the motor (31) is fixedly connected to a connecting sleeve (38), an inner wall of the connecting sleeve (38) is provided with an inner gear ring (39), one end of a spring (310) is fixedly connected to the surface of the driving shaft (36), the other end of the spring (310) is fixedly connected to a triangular prism block (311), one end of a telescopic rod (312) is fixedly connected to a side of the triangular prism block (311) close to the driving shaft (36), and the other end of the telescopic rod (312) is fixedly connected to the surface of the driving shaft (36).

3. A positioning fixture according to claim 1, characterized in that: The surface of the bidirectional threaded rod (34) penetrates the inner wall of the guide plate (41), and the surface of the bidirectional threaded rod (34) is threadedly connected to the inner wall of the guide plate (41).

4. A positioning fixture according to claim 1, characterized in that: The number of the hollow rectangular blocks (46) is five, and the five hollow rectangular blocks (46) are arranged in an array.

5. A positioning fixture according to claim 1, characterized in that: The surface of the lightweight piston rod (413) penetrates the inner wall of the hollow rectangular block (46), and the surface of the lightweight piston rod (413) is piston-connected to the inner wall of the hollow rectangular block (46).

6. A positioning fixture according to claim 1, characterized in that: The surface of the lightweight piston rod (413) penetrates the inner wall of the connecting plate (45), and the surface of the lightweight piston rod (413) penetrates the inner wall of the guide plate (41).

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